Coke oven



A. ROBERTS. I COKE OWE-JV. mxl ucailpm ngso MAR. 11, 1920.

1,430,588. I Patanted Oct. 3, 1922.

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A. ROBERTS.

COKE OVEN. APPLICATION FILED HAR- 8/1920.

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Patented Uet. 3, 1922.

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aaraur ARTHUR ROBERTS, 0F EVANSTON, ILLINOIS, ASSIGNOE, BY MESNE ASSIGNMENTS, TO CHICAGO TRUST COMPANY, TRUSTEE, OF CHICAGQ, ILLINOIS, A CORPORATION.

COKE OVEN.

Application filed March 8,

To all whom it may concern:

Be it known that I, ARTHUR ROBERTS, a citizen of the United States, residing at Evanston, county of Cook and State of ,Illi-. nois, have invented certain new and useful Improvements in Coke Ovens and the like, of which the following is a specification.

This invention relates to certain improvements in coke ovens and the like. The features of the invention concern themselves particularly with the construction of the transfer flue or flues of that general type of oven in which two sets of "ertically extending flues are provided in each wall with suitable burners at one end of said flues, generally the bottom end; thehorizontally extending transfer flue joining together the upper ends of said vertical flues; the operation being such that on one portion of the heating cycle the burners in one set of flues are in operation delivering heating gases upwardly through said flues, which heating gases then traverse the transfer flue and are delivered into the upper ends of the other set of heating flues through which they pass downwardly to the point of delivery. On the other half of the heating cycle the operation is reversed.

Since the entire volume of gas must be transferred through the transfer flue, the same must of necessity be of considerable size; and in one standard type of construction which is well known in the art this flue is commonly built 139,; inches wide and 20 inches high, and its length from end to end is 38 feet 6 inches. Such a flue is a source of great weakness in the structure and it frequently happens that it develops leaks which not only seriously interfere with the proper operation of the oven and proper flow of the heating gases, but also entail serious losses of the distillate gases and wastage of the heating gases themselves.

The main object of the present invention is to provide, in structures of this general type, a transfer flue comprising notched blocks of such form that when they are set together they constitute practically a homogeneous section of wall structure having on its interior gas transferring passages of the desired size and cross-sectional area for the free transfer of the gases.

Other objects and uses of the invention will appear from a detailed description of the same, which consists in the features of 1920. Serial NO. 363,990.

construction and combinations of parts here inafter described and claimed.

In the drawings Figure 1 shows a longitudinal section through a coke oven heating wall of the general type hereinbefore mentioned, having applied thereto, however, the features of the present invention;

Fig. 2 shows a section at right angles to Fig. 1 through three of the heating walls and correlated structure;

Fig. 3 shows an enlarged fragmentary detail section through a portion of a transferring flue embodying the features of the present invention; and

Fig. 4 shows a fragmentary detail section corresponding to Fig. 3 of a modified type of construction.

As a matter of convenience 1 have illustrated the present invention as applied to that type of construction in which each heating wall has on its interior two series of vertically extending flues, 5 and 6, as shown in Fig. 1, there being a fuel gas nozzle 7 in the lower portion of each of said flues, the nozzles in the lower ends of the fines 5 being supplied periodically with fuel gas through a connection 8, and the nozzles pipe 8.

In the upper portion of each heating wall 1 is located a transfer flue 10; and the communication of the upper end of each of the vertical flame flues with said transfer flue may be controlled by the damper block 11. Inspection ports 12 are often located in V81" tical alignment with the flameflues 5 and 6, which inspection ports may be shut off from said flame flues by means of the blocks 13, which are normally in closed position as shown in Fig. 1.

llf desired, the regenerator chambers 14 and 15 may be provided in conjunction with the sets of flame fliies in the manner which is well understood in the art.

On one-half of the cycle of operations ga will be supplied to the burners 7 and heated air from the corresponding regenerator 14 will be delivered adjacent to said burners through the connections 16, the resulting products of combustion or flame rising through the flues 5 and past the dampers 11 and being collected in the transfer flue 10;

the gas so collected being transferred to the upper ends of the flame flues 6, past their dampers 11, down through said flame flues 6, and out through the corresponding passages 16 to the corresponding regenerator 15, which is thereby heated by the-waste or spent gases. On the other half of the cycle the operation is reversed in the manner well understood in the art.

For the purpose of strengthening and reinforcing said transfer flue, I construct the same, as is clearly shown in Fig. 1, of a series of notched blocks whose side portions or faces are notched or recessed so that when the end portions of the adjacent blocks are set together the wall sections 18 and 19 are built in solid form, the central portions of the notched blocks providing in themselves the tie or reinforcement bars 17.

It will be observed in this connection that, as a matter of convenience, these blocks may be of greater length than height and that the edges of the tie portions of the blocks may be beveled or tapered so as to facilitate the movement of the gases back and forth past them in the operation of the oven. The cross-sectional area available for the free transfer of the gases in either direction may be made as large as desired by proper proportions and design of the notched blocks and by selecting a suitable number of courses.

In the particular construction shown in Figs. 1 and 3 each course of blocks in the transfer flue 10 is made up of a complete set or number of notched blocks; whereas in the modified construction shown in Fig. f each course'is only provided with a notched or tie block in alternate spaces. This modifled construction will provide a larger percentage of cross-sectional area for the transfer of gases, but with a corresponding reduction in the relative number of tie bars or sections; and it will be evident that in any given case the desired amount of cross-sectional area may be secured in conjunction with the desired reinforcing or stifl'ening of the flue by a suitable selection of sizes of recesses or notches in the blocks in conjunction with a suitable arrangement or positionin of said blocks in the flue.

I will state that the general type of notched block herein illustrated is similar to that disclosed in Letters Patent of the United States No. 1,132,685, issued to me March 23, 1915, for improvements in coke ovens, and this is a very satisfactory type of construction. However, I wish it clearly understood that I do not limit myself in the practice of the present invention to this or any other type of construction. The essential and desirable thing is, in the present case, to provide tie 'or reinforcement blocks joining together in suitable form or manner the side walls of the transfer flue in such fashion as to reinforce said flue and make it capable of withstanding the stresses which it normally encounters in service.

I claim:

1.' In a coke oven, a heating wall having a series of vertical flame flues, the flame flues of substantially one-half of the heating wall comprisin one group, and the flame flues of substantia ly the other half of the heating wall comprlsing another group, and a transfer flue in communication with the upper ends of all of the flame flues of both groups, said transfer flue comprising a series of notched blocks laid up in courses with their end portions in contact with each other, the notches of the various blocks providing a series of passages communicating with each other and constitutin the flame flue passage and thenotches of said blocks being located in vertical alignment with respect to the various flues, substantially as described.

2. In a coke oven, a heating wall having on its interior a series of vertically extending flame flues, and a transfer flue connecting together the upper ends of the flame flues, said transfer flue comprising a series ofnotched blocks laid up with their end portions in contact with each other, the notches of the blocks co-operating to provide the longitudinally extending transfer flue, substantially as described.

3. In a coke oven, a heatin wall having on its interior a series of vertically extending flame flues, and a longitudinally extending transfer flue in communication with the said flame flues, said transfer flue having a series of crosswise extending tie blocks jolning together the side portions of the transfer flue and reinforcing the same while permittin free transfer of gas through the transfer ue, substantially as described.

4. In a coke oven, a heating wall having on its interior a series of vertically extending flame flues, and a transfer flue section adjacent to the ends of said flame flues and joining said ends together, said transfer flue section comprising notched blocks extending through the wall at such section, the notches of said blocks co-operating to provide in said transfer flue section a gas passage communicating with the ends of.the various flame flues. substantially as described. ARTHUR ROBERTS. 

